CSC263 Computer Org & Arch I - Arithmetic Homework Answers

Homework Answers: Arithmetic

Show the assembler instructions equivalent to each of the following.

     add     $t0, $t1, $t2
     addi    $t0, $t0, 1

     sub     $t0, $t1, $t2
     sub     $t0, $t0, $t3

     addi    $t2, $t1, 5
     li      $t3, 2
     mult    $t2, $t3
     mflo    $t0

     li $t2, -1
     xor     $t0, $t3, $t2        # flip all bits of t1
     addi    $t0, $t0, 1          # and add 1 to get -$t3
          or
     sub     $t0, $0, $t3         # t0 = 0 - t3

```
     move    $t0, $0
```
```
     addi    $t0, $t0, 1
```
```
     addi    $t0, $t0, -1
```

     li      $t5, 4
     mult    $t0, $t5
     mflo    $t0

     sub     $t0, $0, $t1
     sub     $t0, $t0, $t2

     add     $t0, $t1, $t1
     add     $t0, $t0, $t1

     li      $t2, 3
     mult    $t1, $t2
     mflo    $t0

     div     $t2, $t3
     mflo    $t4
     sub     $t0, $t1, $t4

     addi    $t3, $t1, 1
     div     $t3, $t2
     mfhi    $t0

```
     $t4 = ($t2 + 10) * $t3;
	
```
```
     $t2 = ($t1 + 4) * 2;
    
```
```
     $t2 = 1 - $t4 / ($t1 - 10);
    
```